Chair-brace



(No Model.) Y 3 Sheets-Sheet l', J. vP. SARGENT.

CHAIR BRAGB.

No. 359,891. Patented'mag'r. 22,1887.

3 sheets-sneet 2. J. F. SARGENT.

GHAIR'BRAGE.

(No Model.)

Patented Mar. Z2, 188'7` Nrrnn STATES Pari-:Nr einen.

Y JAMES F. SARGE-NT, OF MANCHES'IE, NEW HAMPSHIRE.

CHAIR-BRACE.

SPECIFICATION forming part of Letters Patent No. 359,891, dated March2v2, 1887.

Application filed July 23. ISES. Serial No. 208,868. (No model.)

To @ZZ whom, it may concern.-

Beit known thaty I, Janes F. Snizer-infr, a citizen of the UnitedStates, residing at Man chester, in the county of Hillsborough and Stateof New Hampshire, have invented certain new and useful Improvements inChair-Braces, of which the following is a specification, reference beinghad therein to the accompanying drawings.

This invention relates to chair-braces which are designed to iirmly holdthe rounds and legs in their respective sockets.

The object of the present invention is to provide a brace which shall besimple in construction, cheap of manufacture, readily applied to eitherold or new chairs or stools, and durable in use, and also to prevent therounds and legs from becoming loose by reason of shrinkage of the wood..

The invention consists of a series of springbraces, the upper and lowerends of which are respectively secured to a center plate and the legs,the plate being adjustable upon a threaded rod,which is hooked over twowire rods which cross each other at right angles and are suitablysecured to the lowerv face of the chair seat or frame, all as will behereinafter described, and more particularly pointed out in the claims.

In the drawings, Figure lis an elevation of a chair having myimprovement attached thereto. Fig. 2 is a detail view showing the mannerin which the hook which supports the plate passes over the transversebars. Fig. 3 is an elevation of a stool with the springbraces hangingfrom their supporting-plate. Fig. 4 is a bottom plan view. Fig. 5 is adetail view; and Fig. 6 is an elevation of a bitstock, partly insection, employed by me in tightening the nut on the brace-supportingplate.

Referring to the drawings, in which like letters of reference refer tolike parts, A designates the seat of a chair or stool having legs B androunds O, which are soeketed, respectively, in the chair seat and legsin the usual manner, with this exception, that when my brace is employedit is not necessary touse glue in the joints.

D is a series of spring-braces, which are secured at their lower ends tothe chair-legs, preferably by means of screws, while their rod F, whenthe nut f 2 is given two or three turns in order to support the plateupon said rod while the lower ends of the spring-braces D are Vbeingsecured to the legs, after which said nut is forced upwardly upon therod by means of a bit-stock, substantially such as I have shown in Fig.6, having a socket which ts upon the nut, but permits the threaded rodto pass upwardly therein as far as may be necessary to draw the bracesfrom the position indicated by dotted lines o in Fig. 6 to the po sitionindicatedby full lines. The dotted lines p indicate the position that anordinary straight brace would occupy. y

After the springs of the braces have been partially drawn out by forcingthe nutf2 upwardly upon the rod F, that portion of the lower end of thelatter which projects below the nut is cut off with a pair ofpiuchers.The effect of the spring-braces, after they have been secured in themanner described, is to exert a constant contracting force upon the legsof the chair, thereby serving to draw them in upon the rounds in case ofshrinkage of the wood, which takes place more or less in all woodenstructures, and which it is essentially necessary to provide against inchairs and stools.

I have found, after applying my brace to a large number of chairs, 85o.,during the past year, that the legs and rounds never become loose, andtherefore never require any further tension to'be put upon the braces byadjusting the securing-nut.

I do not limit myself to the exact form and proportion of parts hereinshown as an embodiment of my invention, the essential features of whichwill be understood from the foregoing description in connection with thedrawings.

I am aware that it is old to secure a se- ICO ries of wires at one endto the seatof the chair and at thek other end to the legs, and toprovide a straining device for securing tension on said Wires, and I donot desire to claim such construction.

That I elainl, and desire to secure by Letters Patent, is-

1. The Combination, with a perforated plate having means for supportingit from the lower face of the chair, of a series of spring-bracessecured to the said pla-te and to the legs of the chair, as and for thepurpose set forth.

2. The combination, With a perforated plate supported from the lowerface of the stool or chair by means of a nut and threaded rod hav#` ing;a hook at its upper end, which passes over two rods connected at theirends to the seat at the point where they intersect, of a series ofspring-braces which are hooked to the peripliery of said plate andsecured to the legs 3. In combination with the transverse rods 2O of thechair, as and for the purpose set forth.

secured at each end to the seat, the threaded I

